Valve-spring lifter



L. M. WOOD VALVE SPRING LIFTER Filed June 2 1924 zsneets-sneet .1

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i L. M.

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Oct. 19 19260 L. M. WODD VALVE SPRING LIFTER Filed June 20,, 9 4 2 Sheets-Sheet 2 INVENTOR ATTO maid Patented Get. 19, 1926.

earner rein.

LOUIS M. WOOD, OF NEVJ' YORK, N. '53., ASSIGNOR TO SEEEID-O MULTIPLE VALVE LIFTER CORPORATION, OF BEE S/7 YORK, YET. Y., A CORFOIt-A'IION F NEW YORK.

VALVE-SPRING LIFTER.

Application filed. June 20, 1924.

This invention relates to valve spring lifters, or valve spring lifting mechanism for internal combustion engines, an object of the invention being to provide an improved lifting mechanism wherein a number of valve springs of an engine may be simultaneously elevated or raised under compression and positively held in such position to permit removal of the valves for the purpose of grinding or repair.

it further object of this invention is to provide an improved valve spring lifter comprising a lifting member or bar adapted to operate against a plurality of valve springs, preferably four or more valve springs, and having improved cam means for operating the lifting member or bar whereby the valve springs may be readily elevated under compression with ease and facility.

A further object of the invention is to provide a valve spring lifter wherein the lifting bar or member is operated by a cam supported for operation by a support or post adapted to engage and rest upon the bottom of the valve spring chamber, and so constructed as to be readily and easily located in position and to form a firm and stable support during operation, and also wherein the cam support and lifting bar are guidin 'ly connected in an improved manner so as to guide the lifting bar during operation against displacement.

Other objects of this invention will ap pear in the following description and appended claims, reference being had to the accompanying drawings forming a part of this specification wherein like reference characters indicate corresponding parts in the several views and wherein Fig. 1 is a front elevation illustrating an embodiment of my invention in operative position with relation to the valve springs of an engine; Fig. 2 is a top plan view of the lifter shown in Fig. 1; Fig. 3 is a rear view illustrating the cam for elevating the lifting member; big. t is a perspective view illustrating a mewhat modified form of my invention; 1. 1g. 5 is a vertical section through the valve spring chamber showing the lifter in position; Fig. 6 is a front elevation reduced in Serial No. 721,167.

size of the lifter shown in Fig. 4i; and Fig. 7 is an end view partly in section of the structure shown in Fig. 6.

Before explaining in detail the present improvement and mode of operation there'- of I desire to have it understood that the invention is not limited to the details of construction and arrangement of parts which are illustrated in the accompanying drawings, since the invention is capable of other embodiments, and that the phraseology which 1 employ is for the purpose of do scription and not of limitation.

Referring to the construction shown in liigs. 1 to 23 inclusive, it will be seen that the valve spring lifter comprises a lifting men her 9 which is adapted. to operate against a plurality of valve springs, in this instance being shown as adapted to elevate six valve springs under compression. The lifting member 9 is preferably cast in the form of an angle bar comprising a vertically extending side 10' and a horizontal side 11 extending at right angles thereto. The horizontal portion 11 of the lifting bar is provided with a series of recesses or slots 12 adapted to embrace the valve stems of the engine and provide seats around the edgesof the recesses for the valve spring retainers. At opposite sides of the center thereof the horizontal member 11 is provided wit-h a downwardly projecting portion or transverse rib 13, and each-rib 13 at the upper face thereof is provided with a transversely extending slot or groove 14. T he vertical member 10 of the angle bar is provided with a pair of lengthwise extending slots communicating with the transverse grooves o-r slots 14, the latter being located substantially centrally of the slots 15. When the lifting member is applied to the engine the companion slots 14 and 15 are adapted to receive studs or bolts 16 which are ordinarily provided for the purpose of securing a cover or door plate in position over the front of the valve spring chamber 17 of the engine.

In the type of engine illustrated in Fig. 1 the enclosing end walls 18 of the chamber 17 project inwardly in front of the opposite end valve springs. The present lifter is constructed so as to utilize the studs or bolts 16 for the purpose of assisting in positioning and guiding the lifter, and since the horizontal portion 11. of the lifting member must have a length suiiicient to extend in front of all of the valve springs, the lifting bar is provided with the horizontal lengthwise extending guide slots 15 so as to enable the lifting bar to be inserted within the end walls 18 of the chamber without removing the studs or bolts 16. The engine in this instance is provided. with a series of six valves provided with valve stems 19 extending into the valve spring chamber 17. The valve springs 20 surround the valve stems and are seated upon the usual cupshaped retainers 21 which are held in position by means of pins 22 extending through holes in the valve stems.

The lifting member is supported for operation by means of a vertically extending post or support- 23 and in the present instance. the lease 2-1- of the supporting post or bar is broadened or flared at opposite sides, and provided with an inwardly projecting extension which is bifurcated to provide a pair of supporting feet 25 and A broad base is thus formed for the upright post or bar 23, and in the present instance it will be noted that the feet 25 and 26 are adapted to rest upon the bottom of the valve spring chamber and are spaced apart a distance greater than the distance between a pair of valve springs, thus forming a firm and stable base for the liftingmember.

The upper part of the post 23 is formed at opposite sides thereof with vertically extending guide flanges 27 and are located in a vertical guideway 28 formed ii an enlarged central part of the member 10. The guideway 28 at the front thereof is provided with inwardly extending guide flanges 29 adapted to overlap the flanges 27. The upright post 23 is bored to receive a rotatable spindle 30 and secured to the inner end of this spindle is a disk 81 which is housed within the guideway 28. Secured to the inner face of the disk 31, as slio vii particularly in Fig. 3 is a spiral or scroll cam which is adapted to engage a projecting cain lug 33 secured to the vertical member 1.0 of the lifting bar. It will be understood that by rotating the disk 31. and thereby the cam 32, the cam lug 3 will travel over the outer face or periphery of the cam whereby the lifting member will be elevated or lowered. The cam 32 engages the curved underside of the projection or lug 3S, and as shown in Fig. 8 where the lug 33 is positioned above the outer end of the spiral earn. the lifting member will be in its extreme elevated position. By rotating the cam disk 31 counter-clock-wise Fig. 3. the lug 88 will travel over the spiral cam and permit the lifting member to b lowered b Y the n'essure of the valve s 'Jrin s 1 u u and when the lug 33 is located at the inner end 353 of the cam, the lifting member will lowest position. The caiii spindle Si) ts outer end is provided with a wrenclr portion 36, and by applying the to the part 36 the wrench niav l e L manipulated to rotate the min spin- (l the cam.

in the fore iiig construction it will be 1 "'d that the cam lug 333 projects into the :28, and that the inner face of the El; llilllllgQS against the inner vertical wall 38 of the guidevray, so that by virtue of the vertica wa l 38 and the vertical guide flan es 29, the

l.il11 l:1', it will be noted that the verwalls of the guide slot iino5 lilSli the opposite ends of the guide sl 0 vii in seen that iuei'nber 9 is also constructed in 13 form e an angle bar, having a vertical side 4i!) and a horizontal side the latter in the iresent instance being slotted or re ceas d at l2 for operation against foi r valve in this instance. The recesses or are adapted to embrace the valve f the engine and provide seats at opposite sides thereof for the valve spring ietainers. and these recesses extend the entire width of the l'iorizontal niei'iiber ll and 1m terminate in vertical slots :13 formed in the ineii'iber ll) of the lifting bar. The slots or recesses f3 are advantageous in eiial'iling the operator to insert his lingers therethroup h 1 the purpose of r inovin the pins 22 or the valve i-prii'igs have been ele a 1 (er compression.

thisins-ilance the lifting member also guided. and supported for oper by means of an upright post or bar angular has coiiipris' ing suppori fig member or post an enlarged b. so l which is adapter upon the liottoiii of the valve spri her.

i he base 6 projects laterally :h side angles to is recessed at l8 in order to embrace jecting part of the valve spring chamber and provide clearance. In this construction the post is cylindrical in form and is housed within a boss or projecting guide or sleeve 4:9 formed centrally at the mner face of the lifting bar 9. It will be noted thatthe guide 49 projects below the horizontal member ll of the lifting bar and is tubular so as to entirely cnibrace the cylin di'ica l guide post 45.

T he post 45 is bored transversely intermedi-atc the top and bottom thereof to receive a rotatable tube or tubular spindle 50. This spindle 56)- at its inner end (see l) is provided with an annular flange 51 which extends over the side edges 52 of a vertical guide slot 5 3 formed in the guide member 459 of the lifting bar. The tube or spindle projects through a corresponding guide slot 5 formed at the opposite outer side of the vertical men'rber 40 of the lifting bar and a cam or eccentric 55 is secured to the spindle 5G and is located at the outer face of the vertical member 40' of the lifting bar. Secured to'the extreme outer end of the tube or spindle 50 is a wrench receiving portion 56; It will be seen tl'ierefore that the spindle 50 rotates in the transverse bore of the post 415 and that the cam 55 and wrench-receiving portion 56 are fixed thereto. Also it will, be noted that the tubular bore of the spindle 50 is extended through the cam 55 and the wmuch-receiving portion 56, thereby per milting the lifter to be inserted over the housing stud or bolt 57 of the engine, this stud or bolt extending through the hollow spindle 50 and through the cam 55 and wrench-receiving portion 56 as shown in Fig. 5.

The lifting bar is provided at the upper central part thereof with a projecting po tion which overhangs the peripheral edge of the cam 55 and is engaged thereby for the purpose of elevating the lifting bar on the guide post 455. In the normal position of the parts of the lifting device the tubular guide 4-9 of the lifting member rests substantially upon the upper face of the base 46 as shown in Fighand the construction is such that when the lifter placed in position in the valve spring chamber 59 the horizontal part tl of the lifting member will be located a substantial distance below the retainers 60 for the valve springs 61, the re t ainers or seats 60' being supported on the usual removable pins 62 located in the valve stems (33; In this position the edge (i l of the cani 55 will be located in engagement with the iuiderside of the cam projection 58 of he lifting member 40. Upon applying a wrench to the wrench-receiving portion 55 of the cam spindle 50 and partially turning the spindle, the cam 55 will he rotated to bring the cam surface 66 beneath the can projection 58 and partially lifting the liftation of the valve springs. Further rotation of the cam 55 until the straight surface 6? is brought beneath the cam projection 58 will cause the lifting bar to slide upwardly upon the guide post 45 and result in compressing the valve springs 61. The peripheral edge of the cam 55 is provided with a plurality of straight faces shown at 67, 68, and 70 terminating in a stop 71 ad pted to engage the cam projection 58 and t the further rotation of the cam. hen straight face 67 is at rest against the under edge of the part 58 the major portion of the lifting operation of the valve springs will have been accomplished, and further rotation of th cam to bring either of the 68, ($9 or 70 into position beneath the t 58 is for the purpose of enabling the springs to be raised to slightly different heights. Since the springs vary slightly in different engines it necessary to elevate the lifting bar to slightly different heights depend upon the particular engine and this plishedby means of the flat cam to 70 inclusive which permit slighteasing variations in the elevation of 1g bar. it will be further noted that g bar will be locked in elevated powhcn the several cam faces 6'? to 70 1 i-sive are in engagement with the cam ection 58. 7

It is important to note that since the tubular guide portion l9 of the lifting bar embraces the post 455, an increased bearing surface of the lifting bar on the guide post is obtnined thereby guiding the lifting bar 1 "re the operation in an effective manner c i :ist any tenden of the lifting bar to tilt or oscillate- Furthermore the lifting bar is readily guided into proper position beneath the valve springs since it is merely nee "y to insert the tubular spindle 50 over the stud or bolt 57 which is present in various types of engines for the purpose of cla-n'ipin the cover plate on the front of the valve s chamber. The cover plate bolt or stud is thus utilized to position the valve spring lifter properly with respect to the valve spr ngs but the entire weight of lifting is carrierL by the guide post 15 having the base dd'thereof resting upon the bottom of the valve spring chamber.

It will also he notes that the present valve lifter is constructed to permit the removal of the valve springs after the valves have been removed and to permit also the ready assemble 5g of the valve springs and retainers while the lifter is in operative position in the valve spring chamber. The lifting bar, as shown in Fig. 5, is so constructed with relation to the base 46 that the horizontal member 41 will normally be spaced a substantial distance below the re tainers (50 when seated on pins 62. After the s' in'ings have been elevated to permit the removal of pins 62 and of the valves 63, the cam may be rotated to lower the member ell to its lowermost position shown in Figs. l and 5, thereby causing the valve springs to expand until free from compression and permitting them together with the retainers, to be easily removed, and then placed in position again on the member 41 for elevation under com n'ession.

It is to be understood that by describing in detail herein any particular form, structure or arrangement, it is not intended to limit the invention beyond tne terms of the several claims or the requiren'ients of the prior art.

Having thus explained the nature of my said invention and described a way of constructing and using the same, although without atten'ipting to set forth all of the forms in which it may be made or all the modes of its use, I claim:

1. ln a valve spring lifter, the combination of a lifting member having guiding means located midway of its length,v a single upright post constructed to rest upon the botton'i or a valve chamber and projecting thru said. guiding means, said lifting member having a plurality of means projecting reaiavardly of the post for engaging a plu rality of valve springs, and a camicarried by the post adjacent to the front of: the lifting member for engaging said lifting member.

2. In a valve spring lifter, the combination of a post, adapted to rest upon the bottom of the valve chamber, a lifting member guided on said post, and means for elevating said lifting member, said post having a hori- Zontal transverse bore for receiving an engine stud or bolt.

3. .ln a valve spring lifter, the combination of a supporting post adapted to rest upon the engine, a lifting member guided thereon, a rotatable member carried by said post and having a transverse bore to receive an engine stud, and means connected to said rotatable men'iber for elevating said lifting i'neniber.

i. In a valve spring lifter, the combination of an upr ght post constructed to rest faces for successively elevating the lifting member into different positions and holding it in each of such positions.

5. In a valve spring lifter, the combination of an upright post constructed to rest upon the bottom of a valve chamber, a lifting member guided by said post midway of the length of said lifting member and having means projecting rearwardly of the post for engaging a plurality of valve springs, and a cam carried by the post at the front side thereof for engaging said lifting mem ber and te minating in a stop for limiting the upward movement of the lifting mem ber.

G. In a valve spring lifter, the combina tion of an upright post constructed to rest upon the bottom of a valve chamber, a lifting member guided by said post midway of the length of said lifting member and havi r means projecting rearwardly of the post for engaging a plurality of valve springs, and a cam carried by the post at the front side thereof for engaging said lifting member, said cam havim a plurality of flat surfaces for successively elevating theli'l'ting member into different positions a. l holdii it in each of such positions, and terminating in a stop for limiting the upward movement of the lifting member.

7. In a valve spring lifter, the combination of an upright post constructed to rest upon the bottom of a valve chamber, a lifting member having a tubular sleeve encircling and guided by said post midway of the length of said lifting member and having means projecting rearwardly of the post for engaging a plurality of valve springs, and a cam carried by the post at the front side thereof for engaging said lifting member.

8. In a valve spring lifter, an upright post adapted to rest upon the bottom of a valve chamber,-a lifting member having a slotted tubular sleeve encircling said post and having means for simultaneously engaging a plurality of valve springs, a rotatable spindle carried by the post and projecting thru the slot of the sleeve, and cam means carried by said spindle for liftii'ig the lifting member.

9. In a valve spring lifter, an upright post adapted to rest upon the bottom of a valve chamber, a lifting member having a slotted tubular sleeve encircling said post and having means for simultaneously engaging a plurality of valve springs, a rotatable spindle carried by the post and projecting thru the slot of the sleeve, and cam means carried by said spindle for lifting the lifting member, said cam means having a plurality of flat surfaces for successively elevating the lifting member into different positions and holding it in each of such positions.

10. ln a valve spring lifter, the combination of an upright post constructed to rest upon the bottom of a valve chamber, a lifting member guided by said post midway of the length of said lifting member and having nfeans at the rear for engaging a plurality of valve springs and having at the front side an overhanging projecting cam engaging portion, and a cam carried by the post at the front side thereof for engaging said overhanging portion for elevating the lifting member.

11. In a valve spring lifter, the combination of an upright post constructed to rest upon tne bottom of a valve chamber, a lifting member guided by said post midway of the length of said lifting member and having means at the rear for engaging a plurality of valve springs and having at the front side at the top thereof an overhanging projecting cam engaging portion, and a retatable stepped formed cam carried by the post at the front side thereof for engaging said overhanging portion for elevating the lifting member.

12. In a valve spring lifter, the combination of a lifting member having midway of its length guiding means, a single up right post projecting tl'irough said guiding means and having an an 'ularly extending foot adapted to rest upon the bottom of a valve spring chamber, said lifting member having a plurality of means for engaging a plurality of valve springs, and a cam pivotally connected to said post for elevating said lifting member.

13. In a valve spring lifter, the combination of a lifting member having midway of its length aprojecting slotted guiding means, a single upright post projecting thru said guiding means and having an angularly extending foot adapted to rest upon the bottom of a valve spring chamber, said lifting member having means for engaging a plurality of valve sprigs, and a rotatable cam pivotally connected to the post transversely thereof and of the lifting member for elevating said lifting member, a part carried by the post working in the slot of the guidmg means.

14. In a valve spring lifting mechanism, the combination of a lifting member comprising a vertical portion and a horizontal portion extending rearward of said vertical portion, a post extending vertically through. said horizontal portion, guide means carried by the vertical portion and cooperating with said post, and a cam supported by said post for elevating said lifting member,

15. In a valve spring lifting mechanism, the combination of a lifting member, a cylindrical post adapted to rest upon the bottom of the valve spring chamber and extending vertically through said lifting member and a cam pivotally supported by said post for elevating said lifting member.

16. In a valve spring lifter, the combination of a lifting member having a laterally projecting guide portion, a post extending vertically therethrough, and cam means pivotally carried by said post for elevating said lifting member.

17. In a valve spring lifter thecombination of an upright support adapted to rest on the engine and having a transverse bore, a lifting member guided on said support, said support having a transverse tubular extension provided with a bore alined with said transverse bore and also provided with a Wrench portion, and a cam carried by said extension for elevating the lifting member.

18. In a valve spring lifting mechanism, the combination of a lifting member comprising a vertical portion and a horizontal portion, a post extending vertically through day of April 1924:.

LOUIS M. WOOD. 

